Archive for the “Math” Category

Dear 4 Terry,

I hope you’re all safe and well. It’s a pity that school was cancelled unexpectedly today, and I’m truly sorry that we can’t all say goodbye to Nicolas today. Nicolas will be back next year for Grade 5, so you’ll all get a chance to catch up with him then.

Here’s some work to keep you on track today:

* Math- We are continuing to work on multiplication.

Cluster Problems- Math activity book pg 9

Activity sheet to practice multiplication strategies: Solving a Multiplication Problem in Two Ways

There is also another assignment to complete by Monday on Ten Marks.

* Reading- Please make sure you keep your reading log up to date. Today, read for at least 30 minutes. Choose a just right book to read for 30 minutes and record it in your reading log. You can also choose to read Our Little Earth or Dogo News which are online current events websites. You can also use online books from the ES Hub website. Remember to read as much as you can over the weekend too!

* Writing- Please begin drafting your opinion editorial in Google docs. Use your school email and password to log in from home. Use the same topic and ideas you have been planning and elaborating over the last few days in class. I know that you won’t have your planning sheet, but try to write an introduction, 3 reasons with supporting evidence, and a conclusion. We will continue to work on it when you’re back at school. You should have the basic draft with 5 paragraphs completed by Monday.

* Social Studies- Read this article on Malala Yousafzai and watch the interview with Jon Stewart.


Now write a blog post or a journal entry to discuss what you think is not fair in the world.

What are the things that you feel most strongly about?

We’re looking forward to seeing you all back at school next week. 

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Our year is quickly coming to a close, but there’s still a lot of learning going on in 4 Terry. Here’s a brief overview of what we will be going on in 4 Terry over the last few weeks of school.

Reading: We have just wrapped up our Non-Fiction reading unit and we will be meeting again in book clubs to discuss Social Issues. The main goal of this unit is for students to gain a deeper understanding and sympathy for people in our world who deal with a variety of social problems. Students will be introduced to various social issues primarily through reading and discussing fiction stories.

Writing: We have just finished up our unit on List Articles and will use our understanding of supporting ideas with examples as we write Opinion Editorials (Op-Eds). This unit links with our reading unit as students often choose to write persuasively about how to right the wrongs faced by people in our world.

Math: We have just finished our study of Fractions and Decimals. This week, we will begin our study of basic algebra. We will then focus on more complex multiplication and division strategies in our final math unit for the year.

Science: This week we will be finishing our study of Magnetism and Electricity. Students are currently testing ideas and exploring a topic of interest in their Independent Science Projects. We will be presenting our findings in a Science Fair next week. See below for more details.

Social Studies: We will end our year with a unit entitled, “Is It Fair?” during which we will explore issues of equality, freedom, prejudice, and justice. This unit also supports the learning we will be doing in reading and writing.


Science Fair- Tuesday 20th May at 1:15-1:45

Parents are invited  to join us for a Grade 4 Science Fair  on  May 20th from 1:15-1:45pm.

4th grade students will be displaying their knowledge of Magnetism and Electricity in the afternoon of May 20th. You’ll have a chance to see your child’s independent project as well as explore what other students in our class and throughout 4th grade have been investigating.

The main ideas behind the independent science project and science fair are to:

  • conduct an investigation based on a question or hypothesis
  • design a clear experiment to conduct a fair test
  • determine variables and change one variable at a time
  • clearly record results
  • effectively present results and the process of the experiment

You child will be given a poster board this week and will be responsible for preparing their display, along with their science partner/s, in time for the Science Fair on May 20. They should display all the steps of the scientific process, and should use their science investigation booklet to guide their presentation. A template is available for those students who would like one to guide their presentation.

We hope you can join us at our Science Fair on Tuesday May 20 at 1.15pm!

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We’re about to wrap up our unit on fractions and decimals.

Click here to access an amazing selection of decimal activities (Thanks to Mr. Jessee!) … and all of them are fun! Please leave a comment which shares the activity you found most helpful … maybe others can learn from it!


Have fun!

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Having Fun with Fractions

We’re having fun exploring fractions right now in math. Many students have shown a great understanding of fractions, what the numerator and denominator actually mean, and how to compare fractions. It’s been great to see how many students are now using words, numbers and pictures regularly to explain their thinking. Please take a look at your child’s home folder for their latest fraction assessment. Here’s an overview of our unit. All the hyperlinks connect to games, so check them out!

The main objectives of our fractions and decimals unit are to:

*Identify fractions of an area

*Identify fractions of a group

*Compare fractions (Dirt Bike Tug Team)

*Order fractions on a number line

*Add and subtract fractions -with like or easier related denominators (Speedway Game)

*Find equivalent fractions (Fractone Game)

*Compare decimals (Decimal Number Line)

*Add and subtract decimals

*Convert common fractions to decimals (Puppy Chase)

Fraction Cards & Decimal Squares Big Ideas

To help review fractions at home please take a look at the Student Handbook on Pearson Success Net, the Math Investigations website.

There are also a lot of great links found under the Math Links on the right hand side of the class blog.

Try out these fun fraction games on BBC Math.

Ready for a challenge? Then try out these fun activities to get your brain working!

Fraction Splat (mixed fractions)

Snow Sprint (multiplying fractions)

Ratio Stadium (ratios)

Dirt Bike Proportions (proportions)

Have fun!


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How Can We Achieve Our Potential As Mathematicians?

We are currently working on the last part of our Unit 5 math unit, Landmarks and Large Numbers. Over the last few weeks, we’ve been working hard on challenging ourselves as mathematicians and showing everything we know. We’ve used the five states of mind, craftsmanship, flexibility, interdependence, efficacy and consciousness, to push our thinking and help us grow as learners.

Here are some questions you can ask yourself to help you be more aware of how you’re doing as a learner (Consciousness):

*How can I use the ‘I can’ statements to improve my learning?

*How can I use assessments to build on my learning?

*Am I aware of what I need to learn?

*How can I make my strategies more efficient?

*What are my strengths and areas of need?


Remember, Good Mathematicians:

(Craftsmanship, Flexibility, Efficacy)

*Estimate before they solve a problem

*Use the problem solving process

*Use multiple strategies

*Use efficient strategies

*Use words, numbers and pictures to explain their thinking

*Check their solution is reasonable

Over the last few weeks, we’ve been working on adding to our addition and subtraction strategies. We’re developing our strategies so that we can use at least two efficient strategies for both addition and subtraction. The short algorithm can be used, but only as an additional strategy (after using two other strategies) or as a strategy for checking our work.

Here are some charts to help you review the big ideas of the unit, as well as strategies for addition and subtraction:

Created with Admarket’s flickrSLiDR.

Tomorrow we will send home the Unit 5 pre-assessment and ‘I can’ statements to help you review at home. We’ll be continuing to work on these problems and ideas at school, so please bring the papers back to school each day.

Leave a comment to show:

*How you used your assessments to build on your learning

*Your strengths and what you’re working on to challenge yourself and improve

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Addition and Subtraction Strategies

Our latest unit in Math is Landmarks and Large Numbers. The unit focuses on place value, addition and subtraction. Remember, in addition, you need to be able to break apart the addends by place, add on to a number, or add on in parts. You should be able to show your thinking in words, numbers and pictures, using number lines or other diagrams to show what addition really is. You must be able to show an understanding of place value as you add and subtract.

Remember to clearly explain your thinking when you solve any problem. Even when math homework may seem easy (like last night), the you should be flexible in your thinking and always try to use multiple strategies. You should also show your thinking in many different ways (numbers, words and pictures). Good mathematicians estimate (using rounding) and check their work (using another strategy or the inverse operation). To meet standards you will be expected to use two different strategies for addition and subtraction, therefore it’s important that you don’t simply rely on the traditional algorithm. If you do use an algorithm you must be able to carefully explain each step.

Please use the math page at the top of the class blog to find resources for this unit. You can also use the Math Investigations website (Pearson Success Net) to access the student handbook pages. The student handbook gives you a number of strategies which we’ll be using in class for addition and subtraction. Your user name and password for Pearson can be found at the front of your agenda.

For a little bit of fun, and to extend your mental math skills, try out this fun link to a mental math mission.

Your mission: Solve the problems to unlock the bio rods.

Click on the picture or the link below to get started.

Mission Mental Math


Ready for a challenge in math?

Check out Calculation Nation for something to extend and challenge your thinking!

Parents, you’ll need to help your child sign up to the site with a user name and password.

Have fun!

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Virtual Manipulatives- Transformations

Some rights reserved by the yes man

Check out these cool activities which help you understand transformations. See if you can move the polygons and see what happens when they are reflected, translated or rotated.

Translation activities

Reflection activities

Rotation activities

Some rights reserved by EricGjerde

You can use translation to create really cool patterns called tessellations. Many designs used in paintings, wallpaper and fabric use transformations like translation, rotation and reflection. Try making your own tessellations with this tessellation activity page. You can also create your own tessellations using white paper, triangle paper or grid paper.

Did the manipulative activities help you to understand transformations more clearly?

Leave a comment to let us know how they helped your learning.

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What’s a quadrilateral? Watch this song to help you remember the characteristics of a quadrilateral.


Here are some more support materials to help you better understand 2D geometry:




Measuring Area

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Multiplication and Division Strategies

Are you wondering what strategies you could use in our new Multiplication and Division unit?

Remember to take a look at the Math Investigations Student Handbook on Pearson Success Net to support your learning at home.

You could also take a look at the vocabulary and big ideas on the Math page at the top of the class blog.

Unit 8 Multiplication & Estimation
Multiplication Problem Solving Strategies
Which strategies do you use to solve multiplication problems?
Is there a new strategy you could use to expand your toolbox of strategies?

What strategies do you use for solving division problems?

Breaking the dividend apart, or finding a multiplication equation that is close to the dividend, are great strategies to start with.

Other resources that can help you add to your math vocabulary and toolbox of strategies are:

* Multiplication & Division Strategies

*Division Strategies

What strategies are you going to add to your math toolbox?

Division Strategies


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Here’s an old system of multiplying invented 400 years ago in Scotland.

Try the lattice method:

Napier’s rods or the lattice method was invented by a Scot, John Napier,  about 400 years ago to help calculate multiplication and division. The strips were originally made from bone.

Watch the video from 1 min- 2.30 minutes for an explanation of the lattice method:


For a simple explanation try Cool Math.

Take a look at these two examples:

Example #1:

Multiply 42 and 35

Arrange 42 and 35 around a 2 × 2 grid as shown below:
Draw the diagonals of the small squares as shown below:

Multiply 3 by 4 to get 12 and put 12 in intersection of the first row and the first column as show below.

Notice that 3 is located in the first row and 4 in the first column. That is why the answer goes in the intersection.

In the same way, multiply 5 and 2 and put the answer in the intersection of second row and the second column

And so forth…


Then, going from right to left, add the numbers down the diagonals as indicated with the arrows.

The first diagonal has only 0. Bring zero down.

The second diagonal has 6, 1, 0. Add these numbers to get 7 and bring it down.

And so forth…


After the grid is completed, what you see in red is the answer that is 1470

Example #2:

Multiply 658 and 47

Arrange 657 and 47 around a 3 × 2 grid as shown below:

Draw the diagonals of the small squares, find products, and put the answers in intersecting rows and columns as already demonstrated:


Then, going from right to left, add the numbers down the diagonals as shown before.

The first diagonal has only 6. Bring 6 down.

The second diagonal has 2, 5, and 5. Add these numbers to get 12. Bring 2 down and carry the 1 over to the next diagonal.

The third diagonal has 3, 0, 3, and 2. Add these numbers to get 8 and add 1 (your carry) to 8 to get 9.

and so forth…


After the grid is completed, what you see in red is the answer to the multiplication that is 30926


Want to try out some more problems? Try

See Ms. Terry for some Napier’s rods strips to try it out for yourself.

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